yes, I have this too.

But in my day, little was done for it.

I am now taking d-chiro inositol (which is used in PCOS patients) and will report in about 3 months on how that is working. This is a new form of regular inositol . Inositol is recommended in some studies, and also by Dr. Jensen Kittley from Obesity's Answer website. She recommends the amino acid taurine with the inositol too.
http://www.obesitysanswer.com/
I have her book and it is interesting too. Her dietary interventions-- The Cell program-- are more restrictive than the Zone, but she claims a high rate of success, too.

500mg 3 times a day of regular inositol, and 1000mg a day of taurine.
Neither is expensive or hard to find. iherb.com is best for all your supplements. Many types to choose from and huge discounts.
The d-chiro inositol I am experimenting with is supposed to be about equal to metformin. I cannot tolerate metformin--gave me acidosis. But d-chiro costs over $100/month... too much for me to recommend here yet. If it reverses my fasting insulin level and helps with the other insulin resistance issues, I will be endorsing it regardless of the cost.

The metformin you know, depletes B12. You should start that right away.